Drawing-board.



No. 850,552. PATENTED APR'.16,-1907.

E. WERNER. DRAWING BOARD.

APPLICATION FILED 0OT.12, 1906.

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' No. 850,552. PATENTED APR. 16, 1907. E. WERNER.

DRAWING BOARD.

APPLICATION FILED OCT. 12, 190 6.

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EMIL WERNER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO ADRIAN ST. CLAIR GARMAN, OF PHILADELPHIA, PENNSYL- VANIA.

DRAWING-BOARD.

Specification of Letters Patent.

Patented April 16,1907.

Application filed October 12.1906. Serial No. 338,592.

To all whom, it may concern.-

Be it known that I, EMIL WERNER, a citizen of the United States, residing in the city and county of Philadelphia,'State of Penn sylvania, have invented a new and useful Drawing-Board, of which the following is a specification.

My invention consists of novel improvements in a drawing-board involving ballbearings for the board proper, also means for imparting rotation to said board in different degrees, also means for supporting a lead pencil, pair of dividers, and holders for patterns, designs, &c., and changing the positions thereof over the board, also means for preventing said holders from dropping from their supports during the adjustment of the same, and, finally, of details of construction, as will be hereinafter described.

Figure 1 represents a top or plan view of a drawing-board embodying my invention. Fig. 2 represents a vertical section thereof on line x :0, Fig. 3. Fig. 3 represents a section of a portion on line y y, Fig. 1. Figs. 1 and 5 represent perspective views of portions thereof. Fig. 6 represents a vertical section of a portion on line 2 2, Fig. 5. Fig. 7 represents a section on line a a, Fig. 5. Fig. 8 represents a section on line b b, Fig. 5. Fig. 9 represents a perspective view of a pencil-holder employed. Fig. 10 represents a perspective view of a device for holding a pattern, de sign, &c., on the paper or sheet placed on the board. Fig. 11 represents a section of aportion on line 0 c, Fig. 10. Fig. 12 represents a section of a portion on line (Z d, Fig. 11.

Similar letters of reference indicate corresponding parts in the figures.

Referring to the drawings, A designates the base of the device, the same having in its upper face the circular runway B, in which are seated the alternately-arranged balls C and coil-springs D.

E designates the drawing-board proper, the same being located over the base A and having in its under side the circular runway F, which receives the upper portion of the balls C and springs D, by which provision the board has ball-bearings on the base and is caused-to rotate with reduced friction, and consequently with much ease and less noise than heretofore, the springs D serving to keep the balls properly spaced apart and preventing them from crowding on each other.

The board is retained on the base and pre vented from jumping therefrom by means of the angle-bars G, one limb of which is secured to the under side of said board, and the other limb thereof freely embraces the under side of said base, all of the above as most plainly shown in Fig. 2. On the board E is the peripheral rim H, in which is a circular row of perforations J for adjusting the extent of the board relative to the required degrees of the circle, as will be hereinafter more fully described.

K designates an index which is stationarily connected with the base A and rises therefrom and freely extends over the board, so as to point to the degrees on the latter, as plainly shown in Figs. 1 and 3.

Connected with the base A is the springplate or bar L, which is provided with a tooth M, forming a detent, (see Figs. 1, 5, and 6,) said toothbeing adapted to enter either of the perforations J of the rim H, and thus control the board B againstimproper rotation, said detent, however, being adapted to be pressed down, and so removed from the rim H, in which case it is adapted to be engaged and held by the latch N, which is mounted on the base A and provided with a handle N for operating purposes. (See Figs. 5 and 6.) The perforations J are also adapted to receive successively the teeth P of a wheel Q, which is connected with the rotatable shaft R, whose bearings are in the rocking-sleeve S, the latter being mounted, as at S, on the ears U of a bracket or plate T, which is connected with the base A. A

The shaft P has a milled head for operating purposes and a serrated wheel V, whose teeth may be engaged by the detent V on the sleeve S, by which provision said head V, and consequently th e wheel A, may be locked against improper rotation, said detent, however, readily yielding to superior force imparted to the head V to rotate the latter for a purpose to be hereinafter stated.

In order to hold the teeth of the wheel A in engagement with the rim G, I employ the spring W, which is interposed between the bracket T and sleeve S and bears upwardly against the latter, the effect of which being apparent on reference to Figs. 7 and 8. When it is desired to hold the teeth of the wheel Q from the rim G, I employ the latch X, which is mounted on the bracket T and adapted to engage with the sleeve S when the latter is lowered. (See Fig. 5.)

Rising from the base A are the posts Y Y, on each of which is mounted the rotatable sleeves Z Z, to which are secured the horizontally-arranged arms A B, the same constituting a compound implement-holder and being located over the board E.

On the arm A is the sliding sleeve C, whichv is pivotally connected, as at D, with the adjacent end of the arm B, it being evident that the arms A B are sustained one by each other, and they may change their positions and sweep over the board, so that appliances connected, say, with the arm A may be variously placed for different services on the between the heads J,

board, appliances being, for instance, the leg E for supporting one limb of a pair of dividers, the carrier and holder F for a leadpencil, and the points G G, which are adapted to engage sufliciently with a pattern or design H on the board E so that the same may be held as the board is rotated and the paper on the latter carried by the same, so that delineation of the pattern or design may be duplicated in the same circle or by properly moving the arms A B, placed over a different part of the paper. The points are held which are pivotally connected, so that they may be turned so as to change the angles of the points so as to be set nearer to or farther from each other for purposes requiring the same. (See Figs. 10, 11, and 12.) The screw K, which pivotally connects said head S, carries the spring L, which bears against the adjacent head J, so that when said screw is loosened for purposes of adjustment said spring bears sufficiently against said head to cause friction on the points without permitting the latter to drop from the head while being adjusted. \Vhen the adjustment is accomplished, the screw K is tightened, thus causing the head to firmly clamp the points, rendering the same immovable therein. The screw K engages with the hangerM, which is adjustably suspended from the arm C by means of the sleeve M so that the points may be moved to the right and left on said arm C, and so be set at various places over the board for purposes requiring the same.

Attention is directed to 'the fact that the wheel V is finely graduated-say in minutesso that the rotation of the same will effect the rotation of the wheel Q, and the teeth thereof when engaging the rim H of the board to move the same to the extent of minutes instead of degrees, which the detent M accomplishes, for when the wheel a is disengaged from the board and the detent M is engaged with the same the board may be rotated degree by degree, the dropping of said detent into the openings J being to that extent. as to clear the board and the wheel Q is 1. In a drawing-board, a base, a drawingboard proper, means on the one member engaging the other to hold the two in proper relation and a compound implement-holder having its members extending at an angle to each other and independently mounted on said base with their adjacent ends movably and slidably united over said board.

2. A rotatable drawing-board, a base, bearing-balls interposed between the board and base, and angular means on one member extended beneath the other to hold the parts in proper relation, combined with a compound implement-holder mounted on the ease outside the periphery of said board and extended over the latter.v

3. A rotatable drawing-board, a base, bearing-balls interposed between the board and base, resilient means interposed between adjacent balls, and angular means on the one member extended beneath the other to hold the parts in proper relation, combined with a compound implement-holder mounted on the base outside the periphery of said board and extended over the latter.

4. A rotatable drawing-board, a base, means on said board extended beneath the base to hold said parts in proper relation, a circular runway in the upper face of said base, bearing-balls for said board occupying said runway, and a compound implementholder having its members extending at an angle to each other and independently mounted on said base outside the periphery of said board with their adjacent ends pivotally and slidably united over said board.

5. A rotatable drawing-board, a base, means on said board extended beneath the base to hold said parts in proper relation, a circular runway in the upper face of said base, bearing-balls for said board occupying said runway, resilient means in said runway alternating with said balls, and a compound implement-holder having its members extend'ng at an angle to each other and independently mounted on said base outside the periphery of said board with their adjacent endsdpivotally and slidably united over said boar 6. A rotatable drawingboard, a rim tliere-- on with a circular row of vertically-dis osed degree-spacing openings thereln, a etent Now when said detent is depressed so adapted to engage with either of said openings, a device for holding said detent removed from said openings and a rotatable device independent of said detent having means to engage said openings.

7. A rotatable drawing-board, a rim thereon with a circular roW of degree-spacing openings therein, a tooth adapted to engage either of said openings, a rotary shaft carrying said tooth, a bearing for said shaft, a serrated Wheel on said shaft and means on said bearing adapted to engage either of the serrations of said Wheel to control the latter.

8. A rotatable drawing-board, a tooth adapted to rotate the same, a rotary shaft carrying said tooth, a bearing for said shaft and means for pivotally mounting said bearing, whereby said tooth may be disengaged from said board.

9. A, rotatable drawing-board, a tooth adapted to rotate the same, a shaft carrying said tooth, a movable bearing for said shaft, and means adapted to engage said bearing to hold said tooth removed from the board,

10. A rotatable drawing-board, a tooth adapted to rotate the same, a rotary shaft carrying said tooth, a movable bearing for said shaft, means for holding said tooth from the board and means for holding said tooth engaged With the board.

11. In a draWing-board, the combination with a rotatable board, of an implementholder extended over the same and formed of independently-movable arms independently pivoted outside the periphery of said board and disposed at an angle to each other, a movable sleeve on one of said arms, and means for adjustably and pivotally connecting said sleeve to the other of said arms.

12. In a drawing-board, a rotatable board, an arm pivotally mounted and extended thereover, pattern or design holding p'oints adjustably pendent from said arm, and a pivoted spring-pressed holder for said points carried by the pendent support.

13. In a drawing-board, pattern or design holding points thereon, a head carrying said points, an adjusting and coni'iecting' screw connecting said head and a resilient device adapted to bear against a member of said head.

14.. A rotatable drawing-board, a tooth adapted to engage therewith, a pivotallymounted shaft carrying said tooth to rotate the same, a serrated wheel on said shaft and means adapted to engage the serrations of said Wheel to controlthe rotation of said tooth and consequently of the board to a smaller extent than the degrees of a circle in which said board is spaced.

EMIL WERNER. Witnesses JOHN A. WIEDERsHEIM O. D. MoVAY. 

